CA1191302A - Tubular joint for receiving and fastening tubular skeleton elements of artificial limbs - Google Patents
Tubular joint for receiving and fastening tubular skeleton elements of artificial limbsInfo
- Publication number
- CA1191302A CA1191302A CA000426244A CA426244A CA1191302A CA 1191302 A CA1191302 A CA 1191302A CA 000426244 A CA000426244 A CA 000426244A CA 426244 A CA426244 A CA 426244A CA 1191302 A CA1191302 A CA 1191302A
- Authority
- CA
- Canada
- Prior art keywords
- coupling
- tubular
- grips
- clamping
- tubular member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000008878 coupling Effects 0.000 claims abstract description 33
- 238000010168 coupling process Methods 0.000 claims abstract description 33
- 238000005859 coupling reaction Methods 0.000 claims abstract description 33
- 210000003414 extremity Anatomy 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/50—Prostheses not implantable in the body
- A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/065—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using screw-thread elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S403/00—Joints and connections
- Y10S403/09—Adjustable clamp
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7041—Interfitted members including set screw
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7047—Radially interposed shim or bushing
- Y10T403/7049—Biased by distinct radially acting means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7062—Clamped members
- Y10T403/7064—Clamped members by wedge or cam
- Y10T403/7066—Clamped members by wedge or cam having actuator
- Y10T403/7067—Threaded actuator
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Transplantation (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Cardiology (AREA)
- Mechanical Engineering (AREA)
- Prostheses (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Materials For Medical Uses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A tubular joint for receiving and fastening a tubular element of an artificial limb includes a tubular member having a chamber to receive the tubular element therein and formed with a recess defined by inner walls of the coupling conically inclined towards each other, two clamping grips overhung in the recess, and an adjusting screw insertable into the coupling to press the clamping grips against the tubular element to clamp the latter in the chamber of the coupling.
A tubular joint for receiving and fastening a tubular element of an artificial limb includes a tubular member having a chamber to receive the tubular element therein and formed with a recess defined by inner walls of the coupling conically inclined towards each other, two clamping grips overhung in the recess, and an adjusting screw insertable into the coupling to press the clamping grips against the tubular element to clamp the latter in the chamber of the coupling.
Description
TUBULAR JOINT FOR R~.CEIVING ~ND F~STENING TUBUI,A~ SK~Lrr~O~J
EL~MENTS OF ARTIF'IClAL LIMB5 BACKGROUND OF THE I~VE~TION
The present invention relates g~nerally to tu~ular joints for use in prothetic devices. More particularly, the invention relates to a tubular joint for receiving and fastening tube-like skeleton elements of an artificial limb, provided with an adjustable manipulation means for changing an inner diameter of the tubular jointO
Known structures of artificial limbs including tubular skeleton elements have a number of disadvantages. The tubular skeleton elements are usually stably adjustahle and cosmetically coated so as to ~atisfy requirements to arti~icial limbs.
To connect the tube-like skeleton,element ~or exa~,ple -to a joint, ~ubular jointSor couplings have been utiliz~d which have been formed with longitudinal slots to receive the ends of respective tubes. A flange portion has been provided at the edge of the longitudinal slot, through ~hich flange a setscrew wa~
extended so that the width of the slot has been changed and adjusted by the setscrew. A decrease in the slot width ater the tubular memher has been inserted caused a decxease in the inner diameter of the tubular coupling so that the tublllar member was clamped in the tubular coupling.
Research which has been conducted with conventional tubular couplings or joints has showed that despite o~ the ract that conventional couplings could satisfactorlly serve fox a almost a year they are rather disadvanta~eous. Since the
EL~MENTS OF ARTIF'IClAL LIMB5 BACKGROUND OF THE I~VE~TION
The present invention relates g~nerally to tu~ular joints for use in prothetic devices. More particularly, the invention relates to a tubular joint for receiving and fastening tube-like skeleton elements of an artificial limb, provided with an adjustable manipulation means for changing an inner diameter of the tubular jointO
Known structures of artificial limbs including tubular skeleton elements have a number of disadvantages. The tubular skeleton elements are usually stably adjustahle and cosmetically coated so as to ~atisfy requirements to arti~icial limbs.
To connect the tube-like skeleton,element ~or exa~,ple -to a joint, ~ubular jointSor couplings have been utiliz~d which have been formed with longitudinal slots to receive the ends of respective tubes. A flange portion has been provided at the edge of the longitudinal slot, through ~hich flange a setscrew wa~
extended so that the width of the slot has been changed and adjusted by the setscrew. A decrease in the slot width ater the tubular memher has been inserted caused a decxease in the inner diameter of the tubular coupling so that the tublllar member was clamped in the tubular coupling.
Research which has been conducted with conventional tubular couplings or joints has showed that despite o~ the ract that conventional couplings could satisfactorlly serve fox a almost a year they are rather disadvanta~eous. Since the
-2--c, ~3~
decrease in the slot width causes a de5crease in the inner diameter of the tubular coupling this le~ds to even further decrease of the inner diameter of the coupling at the ~ree end thereof. Therefore the tube inserted into the coupling will be held substantially at its outermost edge. This will lead to circular sharp loads exerted on the clamped tube which will be loaded by local forces. These loads can cau~e significant local weakening of the tube after a certain period of time which would affect stability of the tube. This can potentially damage the tube connection, for example a tube connection of the hip joint with the upper shank joint tube, due to a lever ratio and relatively great forces acting on the tube connections. With the use of fiber-reinforced plastics tubes there is a ris]c of damaging of fiber laminations oriented in the direction o loacls exerted on the tube 5 .
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved tubular joint for receivin~ and fastening a tubular element of an artificial limb.
lt is a furthex object of the invention to provide a joint which ensures a reliable fastening of the tubular element without, howeverJ weakening the tubular element clamped in the joint.
These and other objects of the invention are attained by a tubular coupling for receivi.ng and fasteni.ng a skeleton tubular element of ar; arti~icial limb~comprising a tubular member having a chamber to receive the tubular element therein and further foxmed with a recess defined by inner wall~ of the oou~lin~
conically inclined towards each other; two clamping grips posi~ioned in said recess~said grips havi.ng circular surfaces corresponding t~ the outer surface of the tubular element to be received in said chamber, and an adjusting screw insertable into the coupling to press agains~ said clamping grips so that said yrips abut against said inner inclined walls and said circular surfaces abut a~ainst the tubular element received in said chambPr to clamp it in position.
Irhe tubular coupling according to the invention ensure~
a surface-like decrease of the inner cross-cection of the tubular member of the coupling by the adjusting screw. The clamping grips may have sufficiently great len~th so that circular 1OCA1 loads on the clamped tubular e.l.ement will be prevented from occurrence.
decrease in the slot width causes a de5crease in the inner diameter of the tubular coupling this le~ds to even further decrease of the inner diameter of the coupling at the ~ree end thereof. Therefore the tube inserted into the coupling will be held substantially at its outermost edge. This will lead to circular sharp loads exerted on the clamped tube which will be loaded by local forces. These loads can cau~e significant local weakening of the tube after a certain period of time which would affect stability of the tube. This can potentially damage the tube connection, for example a tube connection of the hip joint with the upper shank joint tube, due to a lever ratio and relatively great forces acting on the tube connections. With the use of fiber-reinforced plastics tubes there is a ris]c of damaging of fiber laminations oriented in the direction o loacls exerted on the tube 5 .
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved tubular joint for receivin~ and fastening a tubular element of an artificial limb.
lt is a furthex object of the invention to provide a joint which ensures a reliable fastening of the tubular element without, howeverJ weakening the tubular element clamped in the joint.
These and other objects of the invention are attained by a tubular coupling for receivi.ng and fasteni.ng a skeleton tubular element of ar; arti~icial limb~comprising a tubular member having a chamber to receive the tubular element therein and further foxmed with a recess defined by inner wall~ of the oou~lin~
conically inclined towards each other; two clamping grips posi~ioned in said recess~said grips havi.ng circular surfaces corresponding t~ the outer surface of the tubular element to be received in said chamber, and an adjusting screw insertable into the coupling to press agains~ said clamping grips so that said yrips abut against said inner inclined walls and said circular surfaces abut a~ainst the tubular element received in said chambPr to clamp it in position.
Irhe tubular coupling according to the invention ensure~
a surface-like decrease of the inner cross-cection of the tubular member of the coupling by the adjusting screw. The clamping grips may have sufficiently great len~th so that circular 1OCA1 loads on the clamped tubular e.l.ement will be prevented from occurrence.
3;~3~
The clamping grips may be positioned in said tubular member so that they are pivotable in the direction of an axis of the tubular member. It is particularly advantageous that the clamping grips are overhung in ~he recess of the tubular coupling This can be provided by means of pins which extend through openings of greater diameters that the diameters o the pins whi~h ar~
further inserted into inclined walls of the clamping grips. The difference between the inner diameters of the openings in the tubular member of the coupling and the outer diameters of the pins, ensure6 the possibility o~ a radial adjustment of the clamping gxips.
Preerably the clamping gxips are pivo~able in the axial direction. This is advantaseous because tube allowances car be significantly compensated.E~en somewhat conically-shaped tuba~
can be properly inserted and clamped in the coupling o~ the inven~ion becau6e they can be adjusted ~o the chamber o~ the coupliny by overhung tilta~le gri~s. The pivokability o the clamping grips in the axial direction ensures that ~hese grips are in point-line contact with the tubular coupling.
) q'he clamping gxip may each have a curved surfaoe corresponding to the respective inclined inner wall of the tubular member, said grips being each connected to the tubular member at a point-extending approximately in the middle of the curvature defining said curved sur~ac~. The coupling may further include pins c~nnecting said clamping grips to said tubular mer,ber, said ~3~3~
clamping grips being adjusta~l~e in position by a hand manipulation of said adjusting screw.
The clamping grips may each have an inclined surface opposite to said circular surface thereof so that two clamping grips inserted into said racess form a conical surface, said adjusting screw having a conical tip cooperating with said conical surface upon advancing of said screw towards the chamber of the tubular member of the coupling.
Due to the conical-type arrangement of the walls of the clamping grips and the inclined walls of the recess of the tubular member of the coupling it is possible to adjust the position of clamping grips by handle manipulation of the adjustin~
screw at the height of pivot points of the grips.
Upon advancing movement of the adjusting screw the clamping grips will slide over the inclined inner walls forming the recess in the coupling tubular member. nue to the conical~
typ~ arrangement only one adjusting screw is suficient to provide slidable movement of both clamping grips parallel to each other. It should be noted that the clamping grips will not be essentially tilted or pivoted in the xadial direction whereby no local loads will be exerted 011 the clamped tubes in the axial direction~
The novel features which are considered as ~haracteris-tic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction 313~
and its method of operation, tocgether with add.itional objects and advantages thereof, will be best under5tood from th~ followiny description of specific embodiments when read in connec-tion with the accompanying drawing.
3~
BRIEF DE5C~IPTION OF THE DRAWINGS
Fig. 1 is an axial sectional view through a tubular coupling according to the invention; and Fig. 2 is a sectional view on line 11-11 of Fig. 1.
DETAILED DESCRXPTION OE' ~HE PREFERRED EMBODIMENTS
~ tubular coupli~g for receiving and ~astening a tubular skeleton element of an artificial limb, shown in Figs. 1 and 2, includes a tube 20 formed with a chamber 1 for securing on the joint element (not shown) and a chamber 2 for receiving therein a tubular member 15.
Chamber 2 which has a substantiall~ circular cross-section is adjustable by means of clamping grips 3 which in turn are adjustable in t,heir radial position by an adjustin~ setscrew
The clamping grips may be positioned in said tubular member so that they are pivotable in the direction of an axis of the tubular member. It is particularly advantageous that the clamping grips are overhung in ~he recess of the tubular coupling This can be provided by means of pins which extend through openings of greater diameters that the diameters o the pins whi~h ar~
further inserted into inclined walls of the clamping grips. The difference between the inner diameters of the openings in the tubular member of the coupling and the outer diameters of the pins, ensure6 the possibility o~ a radial adjustment of the clamping gxips.
Preerably the clamping gxips are pivo~able in the axial direction. This is advantaseous because tube allowances car be significantly compensated.E~en somewhat conically-shaped tuba~
can be properly inserted and clamped in the coupling o~ the inven~ion becau6e they can be adjusted ~o the chamber o~ the coupliny by overhung tilta~le gri~s. The pivokability o the clamping grips in the axial direction ensures that ~hese grips are in point-line contact with the tubular coupling.
) q'he clamping gxip may each have a curved surfaoe corresponding to the respective inclined inner wall of the tubular member, said grips being each connected to the tubular member at a point-extending approximately in the middle of the curvature defining said curved sur~ac~. The coupling may further include pins c~nnecting said clamping grips to said tubular mer,ber, said ~3~3~
clamping grips being adjusta~l~e in position by a hand manipulation of said adjusting screw.
The clamping grips may each have an inclined surface opposite to said circular surface thereof so that two clamping grips inserted into said racess form a conical surface, said adjusting screw having a conical tip cooperating with said conical surface upon advancing of said screw towards the chamber of the tubular member of the coupling.
Due to the conical-type arrangement of the walls of the clamping grips and the inclined walls of the recess of the tubular member of the coupling it is possible to adjust the position of clamping grips by handle manipulation of the adjustin~
screw at the height of pivot points of the grips.
Upon advancing movement of the adjusting screw the clamping grips will slide over the inclined inner walls forming the recess in the coupling tubular member. nue to the conical~
typ~ arrangement only one adjusting screw is suficient to provide slidable movement of both clamping grips parallel to each other. It should be noted that the clamping grips will not be essentially tilted or pivoted in the xadial direction whereby no local loads will be exerted 011 the clamped tubes in the axial direction~
The novel features which are considered as ~haracteris-tic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction 313~
and its method of operation, tocgether with add.itional objects and advantages thereof, will be best under5tood from th~ followiny description of specific embodiments when read in connec-tion with the accompanying drawing.
3~
BRIEF DE5C~IPTION OF THE DRAWINGS
Fig. 1 is an axial sectional view through a tubular coupling according to the invention; and Fig. 2 is a sectional view on line 11-11 of Fig. 1.
DETAILED DESCRXPTION OE' ~HE PREFERRED EMBODIMENTS
~ tubular coupli~g for receiving and ~astening a tubular skeleton element of an artificial limb, shown in Figs. 1 and 2, includes a tube 20 formed with a chamber 1 for securing on the joint element (not shown) and a chamber 2 for receiving therein a tubular member 15.
Chamber 2 which has a substantiall~ circular cross-section is adjustable by means of clamping grips 3 which in turn are adjustable in t,heir radial position by an adjustin~ setscrew
4. Clamping grips 3 extend approximately along the whole length of chamber 2 which recei.ves tubular member 15.
The str-lcture of the tubular joint accorcling to the inventio~ is clearly seen ~rom Fig. 2. Clamping grips 3 are positioned in a recess S pro~ided in the tubular joint. Recess 5 is formed by two inner walls 6 of tubular element 20,which walls extend conicall~ toward each other. Clamping yrips 3 have inclined outer surfaces 7 which abut against conical walls 6 constituting recess 5. Inner surfaces or walls 8 of the clamping grips fa~ing toward chamber 2 have somewhat circular cross sections which define a circular surface into which chamber 2 merges.
Clamping grips 3 are held in their axial postion by setscrew 4 which urge clamping grips 3 against tubular member, 15 inserted into chamber 2. ~djusting screw 4 is formed as a hollow screw. In addition the clamping position of grips 3 is ensured by means of rivet~like pins 9. Pins 9 extend throu~h _g -3~
respective through holes 10 ormed in conical walls provided in a projection 20' of tubular element 20 of the joint and further into raspecti~e openings formed in clamping grips 3. Through holes 10 have greater diameters than those of pins 9.
Adjusting screw or axle 4 is inserted into a thxeaded bore 11 provided in projection 20'approximately at the half of the height of clamping grips 3. Setscrew 4 has in the preferred embodiment a conical tip 12. Clamping ~ri.ps 3 are formed with conical surfaces 14 at theix edges 13 which in assembly form a conical surface cooperating with the conically formed tip 12 of setscrew .~.
When setscrew ~ is loosened tubuLar membex lS is i.nserted into chamber 2. Upon advancing of setscrew 4 will conical tip 12 thereo~ cooperate with conical surfaces 14 of grip, 3 to press one grlp away from another. Due to thi~s pressure circular surfaces 3 of clamping g~ips 3 opposite to respective surfaces 14 wi.ll he pressed toward the interior of chamber ~ so as to clamp tubular member 15 in chamber 2. Eventually manu-facturing unevenness of tube 15,such as non-circular or conical periphery thereof will be compensated by the overhung position of cl~nping grips 3 mounted in assembly by pins 9.because clamping grips 3 are able to pi~ot or tilt in each direction,particularly in the axial direction. The non-circular or conical periphery o the tube end will be compensated b~ ~lamping grips 3 by the surface contact pressure exerted on the t~lbe along approximate:Ly L3~
L the entire length thereof. ~herefore, damaye and weakening of tubes 15 due to local limited loads will be totally prevented.
It will be understood thak each of the elements describ~
above, or two or more together, may also find a useful appli-i cation in other types of tubular joints for fastening skeleton elem~nts of artificial limbs difering from the types described above.
While the invention has been illustrated and described as embodied in a tubular joint, it is not intended to be limited 0 to the details shown, since various modifications and structural changes may be made without departing in ally way from the spirit of the present invention.
Withou-t further analysis, the foregoing will so fully xeveal the gist of the pxesent invention that others can, by applying current knowledge, readil~ adapt i~ for various appli--cations without omitting features that, from the standpoint of prior art, fairly constitute essential charactexistics oE the generic or speciic aspects of this invention.
What is claimed as new and desired to be protected O by Letters Patent is set forth in the appended claims.
The str-lcture of the tubular joint accorcling to the inventio~ is clearly seen ~rom Fig. 2. Clamping grips 3 are positioned in a recess S pro~ided in the tubular joint. Recess 5 is formed by two inner walls 6 of tubular element 20,which walls extend conicall~ toward each other. Clamping yrips 3 have inclined outer surfaces 7 which abut against conical walls 6 constituting recess 5. Inner surfaces or walls 8 of the clamping grips fa~ing toward chamber 2 have somewhat circular cross sections which define a circular surface into which chamber 2 merges.
Clamping grips 3 are held in their axial postion by setscrew 4 which urge clamping grips 3 against tubular member, 15 inserted into chamber 2. ~djusting screw 4 is formed as a hollow screw. In addition the clamping position of grips 3 is ensured by means of rivet~like pins 9. Pins 9 extend throu~h _g -3~
respective through holes 10 ormed in conical walls provided in a projection 20' of tubular element 20 of the joint and further into raspecti~e openings formed in clamping grips 3. Through holes 10 have greater diameters than those of pins 9.
Adjusting screw or axle 4 is inserted into a thxeaded bore 11 provided in projection 20'approximately at the half of the height of clamping grips 3. Setscrew 4 has in the preferred embodiment a conical tip 12. Clamping ~ri.ps 3 are formed with conical surfaces 14 at theix edges 13 which in assembly form a conical surface cooperating with the conically formed tip 12 of setscrew .~.
When setscrew ~ is loosened tubuLar membex lS is i.nserted into chamber 2. Upon advancing of setscrew 4 will conical tip 12 thereo~ cooperate with conical surfaces 14 of grip, 3 to press one grlp away from another. Due to thi~s pressure circular surfaces 3 of clamping g~ips 3 opposite to respective surfaces 14 wi.ll he pressed toward the interior of chamber ~ so as to clamp tubular member 15 in chamber 2. Eventually manu-facturing unevenness of tube 15,such as non-circular or conical periphery thereof will be compensated by the overhung position of cl~nping grips 3 mounted in assembly by pins 9.because clamping grips 3 are able to pi~ot or tilt in each direction,particularly in the axial direction. The non-circular or conical periphery o the tube end will be compensated b~ ~lamping grips 3 by the surface contact pressure exerted on the t~lbe along approximate:Ly L3~
L the entire length thereof. ~herefore, damaye and weakening of tubes 15 due to local limited loads will be totally prevented.
It will be understood thak each of the elements describ~
above, or two or more together, may also find a useful appli-i cation in other types of tubular joints for fastening skeleton elem~nts of artificial limbs difering from the types described above.
While the invention has been illustrated and described as embodied in a tubular joint, it is not intended to be limited 0 to the details shown, since various modifications and structural changes may be made without departing in ally way from the spirit of the present invention.
Withou-t further analysis, the foregoing will so fully xeveal the gist of the pxesent invention that others can, by applying current knowledge, readil~ adapt i~ for various appli--cations without omitting features that, from the standpoint of prior art, fairly constitute essential charactexistics oE the generic or speciic aspects of this invention.
What is claimed as new and desired to be protected O by Letters Patent is set forth in the appended claims.
Claims (7)
1. A tubular coupling for receiving and fastening a skeleton tubular element of an artificial limb, comprising a tubular member having a chamber to receive the tubular element therein and further formed with a recess defined by inner walls of the coupling conically inclined towards each other; two clamping grips positioned in said recess, said grips having circula:
surfaces corresponding to the outer surface of the tubular element to be received in said chamber, and an adjusting screw insertable into the coupling to press against said clamping grips so that said grips abut against said inner inclined walls and said circular surfaces abut against the tubular element received in said chamber to clamp it in position.
surfaces corresponding to the outer surface of the tubular element to be received in said chamber, and an adjusting screw insertable into the coupling to press against said clamping grips so that said grips abut against said inner inclined walls and said circular surfaces abut against the tubular element received in said chamber to clamp it in position.
2. The coupling as defined in claim 1, wherein said clamping grips are positioned in said tubular member so that they are pivotable in the direction of an axis of the tubular member.
3. The coupling as defined in claim 2, wherein said clamping grips are overhung in said recess.
4. The coupling as defined in claim 3, wherein said adjusting screw is inserted into said tubular member at the height thereof corresponding to positions of pivot points of said clamping grips.
5. The coupling as defined in claim 4, wherein said clamping grips each has a curved surface corresponding to the respective inclined inner wall of the tubular member,said grips being each connected to the tubular member at a point extending approximately in the middle of the curvature defining said curved surface.
6. The coupling as defined in claim 5, further including pins connecting said clamping grips to said tubular member, said clamping grips being adjustable in position by a hand manipulation of said adjusting screw.
7. The coupling as defined in claim 6, wherein said clamping grips each has an inclined surface opposite to the circular surface thereof so that two clamping grips inserted into said recess form a conical surface, said adjusting screw having a conical tip cooperating with said conical surface upon advancing of said screw towards said chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3214772.4 | 1982-04-21 | ||
| DE3214772A DE3214772C1 (en) | 1982-04-21 | 1982-04-21 | Pipe sleeve for receiving and fastening pipe skeleton parts of artificial limbs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1191302A true CA1191302A (en) | 1985-08-06 |
Family
ID=6161508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000426244A Expired CA1191302A (en) | 1982-04-21 | 1983-04-20 | Tubular joint for receiving and fastening tubular skeleton elements of artificial limbs |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4529332A (en) |
| EP (1) | EP0095567B1 (en) |
| JP (1) | JPS5917343A (en) |
| AT (1) | ATE20178T1 (en) |
| BR (1) | BR8302044A (en) |
| CA (1) | CA1191302A (en) |
| DE (1) | DE3214772C1 (en) |
| ES (1) | ES281065Y (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514186A (en) * | 1989-04-13 | 1996-05-07 | Phillips; Van L. | Attachment construction for prosthesis |
| DE8905222U1 (en) * | 1989-04-25 | 1990-06-13 | Lindauer Dornier Gmbh, 8990 Lindau, De | |
| US5376129A (en) * | 1990-12-04 | 1994-12-27 | Board Of Regents, The University Of Texas System | Method and apparatus for making prosthetic socket preforms, prosthetic sockets, and socket attachment component |
| TW238244B (en) * | 1992-03-24 | 1995-01-11 | Lehn Phillips Van | |
| JPH06213299A (en) * | 1993-01-20 | 1994-08-02 | Nippon Seiko Kk | Fixing construction of fitting member of nut |
| US5279181A (en) * | 1993-04-20 | 1994-01-18 | Hedstrom Corporation | Tricycle steering assembly |
| DE9408804U1 (en) * | 1994-05-30 | 1994-08-11 | Bock Orthopaed Ind | Pipe adapter |
| US5536102A (en) * | 1995-01-13 | 1996-07-16 | Kao; Yu-Chen | Locking mechanism for bicycle head tube |
| EP0841043A3 (en) * | 1996-11-06 | 2000-04-12 | Otto Bock Orthopädische Industrie Besitz- und Verwaltungs-Kommanditgesellschaft | Orthopaedic clamp connection |
| DE29620375U1 (en) * | 1996-11-22 | 1997-03-20 | Trw Repa Gmbh | Fastening device for locking a vehicle steering wheel on a steering shaft |
| US5888015A (en) * | 1997-02-05 | 1999-03-30 | Brown; Kris H. | Wedge lock rod gripper |
| US5802673A (en) * | 1997-05-19 | 1998-09-08 | Dero Enterprises, Inc. | Crank handle for actuating a window pane |
| US6044573A (en) * | 1998-03-25 | 2000-04-04 | Cockrill; Huston G. | Measuring device |
| JP2002535038A (en) * | 1999-01-26 | 2002-10-22 | ヴァン エル フィリップス | Quick release coupler for foot orthosis |
| FR2829689B1 (en) * | 2001-09-14 | 2004-06-25 | Frederic Fortin | NUCLEUS PROSTHESIS AND ITS INSERTION DEVICE AND ITS POSITIONING METHOD |
| US6860565B2 (en) * | 2002-05-14 | 2005-03-01 | Ernest Spence, Jr. | Vehicle tilt seat handle coupling |
| SE534235C2 (en) * | 2009-10-23 | 2011-06-07 | Clamco Invest Ab | Metal profile, fastening device and housing including fastening system with metal profile and fastening device |
| DE102011013815B4 (en) * | 2011-03-14 | 2015-02-19 | Streifeneder Ortho.Production Gmbh | Locking device, in particular for prostheses |
| DE102011112830B3 (en) * | 2011-09-12 | 2013-02-21 | Medi Gmbh & Co. Kg | Prosthetic tube adapter |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US564741A (en) * | 1896-07-28 | Velocipede steering-head | ||
| DE1073813B (en) * | 1960-01-21 | Carl Hamacher Kommandit-Gesellschaft, Wattenscheid | Sleeve-type plug-in pipe coupling | |
| US1074839A (en) * | 1913-04-10 | 1913-10-07 | Ulysses G Clark | Lock-joint for wind-shields. |
| GB214096A (en) * | 1923-05-07 | 1924-04-17 | Charles Desoutter | A new or improved device or appliance for use in fitting artificial legs |
| US2194800A (en) * | 1937-10-04 | 1940-03-26 | Ley George Albert | Adjustable clamp |
| DE735068C (en) * | 1941-03-25 | 1943-05-05 | Carl Fernis | Sealing device with clamping ring of pipes under the action of a weight lever |
| US2760800A (en) * | 1951-12-19 | 1956-08-28 | Stephen N Wekeman | Multi-purposed collar for shafts |
| PL68770B1 (en) * | 1970-05-14 | 1973-02-28 | ||
| US4092079A (en) * | 1975-12-02 | 1978-05-30 | Interpace Corporation | Connector for use in a method for replacing an existing utility pole without disturbing hardware mounted thereon |
| DE2601906A1 (en) * | 1976-01-20 | 1977-07-21 | Menzel Geb Stueberitz Edith | ADJUSTMENT DEVICE FOR THIGH STEMS OF LEG PROSTHESES |
| JPS5659088A (en) * | 1979-10-19 | 1981-05-22 | Matsushita Electric Works Ltd | Pipe joint |
-
1982
- 1982-04-21 DE DE3214772A patent/DE3214772C1/en not_active Expired
-
1983
- 1983-03-24 EP EP83102933A patent/EP0095567B1/en not_active Expired
- 1983-03-24 AT AT83102933T patent/ATE20178T1/en active
- 1983-04-19 JP JP58067882A patent/JPS5917343A/en active Pending
- 1983-04-19 ES ES1983281065U patent/ES281065Y/en not_active Expired
- 1983-04-20 US US06/486,847 patent/US4529332A/en not_active Expired - Lifetime
- 1983-04-20 CA CA000426244A patent/CA1191302A/en not_active Expired
- 1983-04-20 BR BR8302044A patent/BR8302044A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES281065Y (en) | 1986-04-01 |
| DE3214772C1 (en) | 1983-08-11 |
| BR8302044A (en) | 1983-12-27 |
| ATE20178T1 (en) | 1986-06-15 |
| ES281065U (en) | 1985-06-16 |
| EP0095567A1 (en) | 1983-12-07 |
| US4529332A (en) | 1985-07-16 |
| EP0095567B1 (en) | 1986-06-04 |
| JPS5917343A (en) | 1984-01-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |